Can you write down eight eights so that they add up to one thousand?

Can you start the fire using two pieces of wood?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Why is the Hole below a Lock?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

When we see 2 but call 10?

There is an exact a week gap between Christmas and New Year. Hence, It is obvious that the new year that comes right after Christmas comes on the same day of the week.

A Strange thing happened in the Year 1777. Christmas occurs on Wednesday and New Year on Monday. How is that possible?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Before Mount Everest was discovered, what was the highest mountain in the world?